R
Russell
Well-known member
I always thought that a sensible halfway point would be a diesel engine with reasonable battery backup using electric rams, motors etc. Not perhaps on a large machine, 15-20 tonne, but on a smaller one.
The advantage of electric motors is that if you run them backwards then they are a generator. For every lift of the boom you drop it, why not recover the energy?
Every digger has an enormous counterweight, which could be called lead acid batteries. They are tougher than lithium and obviously their weight is an advantage.
No fancy brushless motors with a filing cabinet full of electronics but a set of series motors with contactors, nice and simple. Ball screws for rams, but possibly a rack and gear instead, motors are motors.
You mean like this?